package edu.sctu.xialei.May.day20150518one;

/**
 * Created by Administrator on 2015/5/18 0018.
 */
public class InterfacePractice {

    public static void main(String[] args) {
        Day day;

        System.out.println("这是接口回调：");

        day = new Today();
        day.showDay();

        day = new Yesterday();
        day.showDay();

        day = new Tomorrow();
        day.showDay();
        new Tomorrow().time_print();

    }
}
